Caesar cipherCaesar cipher, is one of the simplest and most widely known encryption techniques.
The transformation can be represented by aligning two alphabets,
the cipher alphabet is the plain alphabet rotated left or right by some number of positions.
When encrypting, a person looks up each letter of the message in the 'plain'
line and writes down the corresponding letter in the 'cipher' line. Deciphering is done in reverse.
The encryption can also be represented using modular arithmetic
by first transforming the letters into numbers, according to the scheme, A = 0, B = 1,..., Z = 25.
Encryption of a letter x by a shift n can be described mathematically as
Plaintext: dissertative

cipher variations:

ejttfsubujwf

fkuugtvcvkxg

glvvhuwdwlyh

hmwwivxexmzi

inxxjwyfynaj

joyykxzgzobk

kpzzlyahapcl

lqaamzbibqdm

mrbbnacjcren

nsccobdkdsfo

otddpceletgp

pueeqdfmfuhq

qvffregngvir

rwggsfhohwjs

sxhhtgipixkt

tyiiuhjqjylu

uzjjvikrkzmv

vakkwjlslanw

wbllxkmtmbox

xcmmylnuncpy

ydnnzmovodqz

zeooanpwpera

afppboqxqfsb

bgqqcpryrgtc

chrrdqszshud

Decryption is performed similarly,
(There are different definitions for the modulo operation.
In the above, the result is in the range 0...25. I.e., if x+n or x-n are not in the range 0...25,
we have to subtract or add 26.)
Read more ...Atbash CipherAtbash is an ancient encryption system created in the Middle East.
It was originally used in the Hebrew language.
The Atbash cipher is a simple substitution cipher that relies on
transposing all the letters in the alphabet such that the resulting alphabet is backwards.
The first letter is replaced with the last letter, the second with the second-last, and so on.
An example plaintext to ciphertext using Atbash:

Baconian CipherTo encode a message, each letter of the plaintext is replaced by a group of five of the letters 'A' or 'B'.
This replacement is done according to the alphabet of the Baconian cipher, shown below.

Affine CipherIn the affine cipher the letters of an alphabet of size m are first mapped to the integers
in the range 0..m - 1. It then uses modular arithmetic to transform the integer that each plaintext
letter corresponds to into another integer that correspond to a ciphertext letter.
The encryption function for a single letter is
where modulus m is the size of the alphabet and a and b are the key of the cipher.
The value a must be chosen such that a and m are coprime.Considering the specific case of encrypting messages in English (i.e. m = 26),
there are a total of 286 non-trivial affine ciphers, not counting the 26 trivial Caesar ciphers.
This number comes from the fact there are 12 numbers that are coprime with 26 that are less than 26
(these are the possible values of a). Each value of a can have 26 different addition shifts (the b value)
; therefore, there are 12*26 or 312 possible keys.Plaintext: dissertative

cipher variations:

ejttfsubujwf

kzddnagbgzmn

qpnnvisbspcv

wfxxdqebefsd

cvhhlyqbqvil

ilrrtgcbclyt

urlljwabarej

ahvvrembmhur

gxffzmybyxkz

mnpphukbknah

sdzzpcwbwdqp

ytjjxkibitgx

fkuugtvcvkxg

laeeobhchano

rqoowjtctqdw

xgyyerfcfgte

dwiimzrcrwjm

jmssuhdcdmzu

vsmmkxbcbsfk

biwwsfncnivs

hygganzczyla

noqqivlclobi

teaaqdxcxerq

zukkyljcjuhy

glvvhuwdwlyh

mbffpcidibop

srppxkudurex

yhzzfsgdghuf

exjjnasdsxkn

knttviedenav

wtnnlycdctgl

cjxxtgodojwt

izhhboadazmb

oprrjwmdmpcj

ufbbreydyfsr

avllzmkdkviz

hmwwivxexmzi

ncggqdjejcpq

tsqqylvevsfy

ziaagthehivg

fykkobtetylo

louuwjfefobw

xuoomzdeduhm

dkyyuhpepkxu

jaiicpbebanc

pqsskxnenqdk

vgccsfzezgts

bwmmanlelwja

inxxjwyfynaj

odhhrekfkdqr

utrrzmwfwtgz

ajbbhuifijwh

gzllpcufuzmp

mpvvxkgfgpcx

yvppnaefevin

elzzviqfqlyv

kbjjdqcfcbod

qrttlyoforel

whddtgafahut

cxnnbomfmxkb

joyykxzgzobk

peiisflglers

vussanxgxuha

bkccivjgjkxi

hammqdvgvanq

nqwwylhghqdy

zwqqobfgfwjo

fmaawjrgrmzw

lckkerdgdcpe

rsuumzpgpsfm

xieeuhbgbivu

dyoocpngnylc

kpzzlyahapcl

qfjjtgmhmfst

wvttboyhyvib

clddjwkhklyj

ibnnrewhwbor

orxxzmihirez

axrrpcghgxkp

gnbbxkshsnax

mdllfsehedqf

stvvnaqhqtgn

yjffvichcjwv

ezppdqohozmd

lqaamzbibqdm

rgkkuhningtu

xwuucpzizwjc

dmeekxlilmzk

jcoosfxixcps

psyyanjijsfa

byssqdhihylq

hoccyltitoby

nemmgtfiferg

tuwwobriruho

zkggwjdidkxw

faqqerpipane

mrbbnacjcren

shllviojohuv

yxvvdqajaxkd

enfflymjmnal

kdpptgyjydqt

qtzzbokjktgb

czttreijizmr

ipddzmujupcz

ofnnhugjgfsh

uvxxpcsjsvip

alhhxkejelyx

gbrrfsqjqbof

nsccobdkdsfo

timmwjpkpivw

zywwerbkbyle

foggmznknobm

leqquhzkzeru

ruaacplkluhc

dauusfjkjans

jqeeanvkvqda

pgooivhkhgti

vwyyqdtktwjq

bmiiylfkfmzy

hcssgtrkrcpg

otddpceletgp

ujnnxkqlqjwx

azxxfsclczmf

gphhnaolopcn

mfrrvialafsv

svbbdqmlmvid

ebvvtgklkbot

krffbowlwreb

qhppjwilihuj

wxzzreuluxkr

cnjjzmglgnaz

idtthuslsdqh

pueeqdfmfuhq

vkooylrmrkxy

bayygtdmdang

hqiiobpmpqdo

ngsswjbmbgtw

twccernmnwje

fcwwuhlmlcpu

lsggcpxmxsfc

riqqkxjmjivk

xyaasfvmvyls

dokkanhmhoba

jeuuivtmteri

qvffregngvir

wlppzmsnslyz

cbzzhueneboh

irjjpcqnqrep

ohttxkcnchux

uxddfsonoxkf

gdxxvimnmdqv

mthhdqynytgd

sjrrlyknkjwl

yzbbtgwnwzmt

epllboinipcb

kfvvjwunufsj

rwggsfhohwjs

xmqqantotmza

dcaaivfofcpi

jskkqdrorsfq

piuuyldodivy

vyeegtpopylg

heyywjnonerw

nuiierzozuhe

tkssmzlolkxm

zaccuhxoxanu

fqmmcpjojqdc

lgwwkxvovgtk

sxhhtgipixkt

ynrrboupunab

edbbjwgpgdqj

ktllrespstgr

qjvvzmepejwz

wzffhuqpqzmh

ifzzxkopofsx

ovjjfsapavif

ulttnampmlyn

abddviypybov

grnndqkpkred

mhxxlywpwhul

tyiiuhjqjylu

zosscpvqvobc

fecckxhqherk

lummsftqtuhs

rkwwanfqfkxa

xaggivrqrani

jgaaylpqpgty

pwkkgtbqbwjg

vmuuobnqnmzo

bceewjzqzcpw

hsooerlqlsfe

niyymzxqxivm

uzjjvikrkzmv

apttdqwrwpcd

gfddlyirifsl

mvnntguruvit

slxxbogrglyb

ybhhjwsrsboj

khbbzmqrqhuz

qxllhucrcxkh

wnvvpcoronap

cdffxkaradqx

itppfsmrmtgf

ojzznayryjwn

vakkwjlslanw

bquuerxsxqde

hgeemzjsjgtm

nwoouhvsvwju

tmyycphshmzc

zciikxtstcpk

liccanrsriva

rymmivdsdyli

xowwqdpspobq

deggylbsbery

juqqgtnsnuhg

pkaaobzszkxo

wbllxkmtmbox

crvvfsytyref

ihffnaktkhun

oxppviwtwxkv

unzzdqitinad

adjjlyutudql

mjddbostsjwb

sznnjwetezmj

ypxxreqtqpcr

efhhzmctcfsz

kvrrhuotovih

qlbbpcatalyp

xcmmylnuncpy

dswwgtzuzsfg

jiggoblulivo

pyqqwjxuxylw

voaaerjujobe

bekkmzvuverm

nkeecptutkxc

taookxfufank

zqyysfrurqds

fgiiandudgta

lwssivpupwji

rmccqdbubmzq

ydnnzmovodqz

etxxhuavatgh

kjhhpcmvmjwp

qzrrxkyvyzmx

wpbbfskvkpcf

cfllnawvwfsn

olffdquvulyd

ubpplygvgbol

arzztgsvsret

ghjjboevehub

mxttjwqvqxkj

snddrecvcnar

zeooanpwpera

fuyyivbwbuhi

lkiiqdnwnkxq

rassylzwzany

xqccgtlwlqdg

dgmmobxwxgto

pmggervwvmze

vcqqmzhwhcpm

bsaauhtwtsfu

hikkcpfwfivc

nyuukxrwrylk

toeesfdwdobs

afppboqxqfsb

gvzzjwcxcvij

mljjreoxolyr

sbttzmaxaboz

yrddhumxmreh

ehnnpcyxyhup

qnhhfswxwnaf

wdrrnaixidqn

ctbbviuxutgv

ijlldqgxgjwd

ozvvlysxszml

upfftgexepct

bgqqcpryrgtc

hwaakxdydwjk

nmkksfpypmzs

tcuuanbybcpa

zseeivnynsfi

fiooqdzyzivq

roiigtxyxobg

xessobjyjero

duccwjvyvuhw

jkmmerhyhkxe

pawwmztytanm

vqgguhfyfqdu

chrrdqszshud

ixbblyezexkl

onlltgqzqnat

udvvboczcdqb

atffjwozotgj

gjppreazajwr

spjjhuyzypch

yfttpckzkfsp

evddxkwzwvix

klnnfsizilyf

qbxxnauzubon

wrhhvigzgrev

dissertative

jyccmzfafylm

pommuhrarobu

vewwcpdaderc

buggkxpapuhk

hkqqsfbabkxs

tqkkivzazqdi

zguuqdlalgtq

fweeylxaxwjy

lmoogtjajmzg

rcyyobvavcpo

xsiiwjhahsfw

The decryption function iswhere a - 1 is the modular multiplicative inverse of a modulo m. I.e., it satisfies the equationThe multiplicative inverse of a only exists if a and m are coprime.
Hence without the restriction on a decryption might not be possible.
It can be shown as follows that decryption function is the inverse of the encryption function,Read more ...

ROT13 CipherApplying ROT13 to a piece of text merely requires examining its alphabetic
characters and replacing each one by the letter 13 places further along in the alphabet,
wrapping back to the beginning if necessary. A becomes N, B becomes O, and so on up to M,
which becomes Z, then the sequence continues at the beginning of the alphabet: N becomes A,
O becomes B, and so on to Z, which becomes M. Only those letters which occur in the English
alphabet are affected; numbers, symbols, whitespace, and all other characters are left unchanged.
Because there are 26 letters in the English alphabet and 26 = 2 * 13, the ROT13 function is its own inverse:

Polybius SquareA Polybius Square is a table that allows someone to translate letters into numbers.
To give a small level of encryption, this table can be randomized and shared with the recipient.
In order to fit the 26 letters of the alphabet into the 25 spots created by the table, the letters
i and j are usually combined.

1

2

3

4

5

1

A

B

C

D

E

2

F

G

H

I/J

K

3

L

M

N

O

P

4

Q

R

S

T

U

5

V

W

X

Y

Z

Basic Form:

Plain:

dissertative

Cipher:

414234345124441144421551

Extended Methods:Method #1

Plaintext: dissertative

method variations:

ioxxkwyfyoak

otccpbdldtfp

tyhhugiqiylu

ydnnzmovodqz

Method #2Bifid cipherThe message is converted to its coordinates in the usual manner, but they are written vertically beneath:

Permutation CipherIn classical cryptography, a permutation cipher is a transposition cipher in which the key is a permutation.
To apply a cipher, a random permutation of size E is generated (the larger the value of E the more secure the cipher).
The plaintext is then broken into segments of size E and the letters within that segment are permuted according to
this key.
In theory, any transposition cipher can be viewed as a permutation cipher where E is equal to the
length of the plaintext; this is too cumbersome a generalisation to use in actual practice, however.
The idea behind a permutation cipher is to keep the plaintext characters unchanged,
butalter their positions by rearrangement using a permutation
This cipher is defined as:Let m be a positive integer, and K consist of all permutations of {1,...,m}For a key (permutation) , define:
The encryption function The decryption function A small example, assuming m = 6, and the key is the permutation
:The first row is the value of i,
and the second row is the corresponding value of (i)The inverse permutation, is constructed by interchanging the two rows,
andrearranging the columns so that the first row is in increasing order, Therefore, is:
Total variation formula: e = 2,718281828 , n - plaintext length